Rotary knife for cutting yarn on quills



Oct. 10, 1950 A. A. HAsLER TAL 2,525,097

ROTARY KNIFE FR CUTTING YARN 0N QUILL Fild June 28, 1945 2 sheetsnget 1a v T .L #a 3+ q (c) 4l 2 3G l0 Q, x @,MN-mmmm 5ms' f., @y I.

i f4 g l y 1 Y A '36' f3" Y. lo

Y la 37 l2 IZ lo,i /3

NVENTORS l A' BERT A.HASLER @ldJACOB PFISTER ATTORNEYS Oct. "10, 1950 A.ALjHAsLERxE-rAL l y 2,525,097

Romy KNIFE Fon cu'r'rmc. YARN oN Qum.

Filed June 28, 1945 2 sheets-sheet 2 a@ Af i .'.L lNvEN-roRs ALBERT A.HASLER and JACOB PF'ISTER ATTO RNEYS Patented ct. O, 1950 UNITED STATES'PATENT OFFICE ROTARYKNIFEFOR CUTTING YARN ,Y Y oNQUILLs Albert A.Hasler and Jacobi Pfister, Hazleton, Pa., assignors -to The DuplanCorporation, Hazleton, Pa., a corporation of Delaware Application June28, 1945, Serial No. V602,106

`6 Claims. 1

The present invention relates to means for severing the tail yarn duringthe initial portion of the winding of the yarn on a quill andparticularly'to the use of a rotary knife mounted on a spring pressedarm to effect such severing.

It is an object of the invention to provide a quill yarn severing devicewhich will be automatically operable during the quill winding operationto sever the starting yarn and which is more effective and consistent inits operation than are the presently used devices of the same generalcharacter.

`ItVA is another object of the invention to provide such a device inwhich the rotary knife thereof` is spring pressed against the quill toeffect the severing operation.

It is a still further object ofk the invention to provide such a devicewhich is simple and rugged of construction and simple and economical tomanufacture. c

Other objects and features of the invention Will be apparent when thefollowing description is considered in connection with the appendeddrawings, in which Figure l is a perspective View of the working partsof the invention in the position which is assumed when a quillstartingyarn Yis beingsevered;

Figure 2 is a fragmentaryelevation partly in section showing the sameoperation as is illustrated inY Figure 1; Figure 3 is a View similar toFigure 2 but showing the position ofl the parts and particularly of therotary knife when the starting yarn has been severed and the rotaryknife has been raised from the quill;

Figure 4 is al fragmentary end view showing therelationshipsof the parts`when they are in the position of Figure 3;

Figure 5 is a fragmentary end view similar to Figure 4 but showing theparts in the position of Figure 2;

Figure 6 is a plan view partly broken away showing the construction ofthe mounting means for the rotary knife;

Figure 7 is a cross sectional view 0f the device of Figure 6, thesection being taken on the plane of the line 'l-'l of Figure 6; and

Figure 8 is likewise a cross sectional View of n the device of Figure 6,the section being taken on the plane of the line 8--8 of Figure 6.

In the prior construction of the same general typeV a hook-like knifehas been utilized which, dueto its small cutting area, became dulledwith some rapidity and, furthermore, tended to remove the end of theyarn from the chuck in which in the machine or, in some instances, tobecomewound on the quill so that the quill winding was improper.

In the present device we supply a rotaryknife Which is spring pressedagainst the heel-of the quill, and which rotates with the quill, therebypresenting substantially diierent surfacesrto the yarn for each cuttingoperation and cutting the yarn cleanly, close to the starting edge ofthe winding.

Referring now to the drawings in Figure l there is shown in perspectivea quill IE! mounted in the usual manner in a chuck II which chuck isrotated by the usual drive means, not shown. The-yarn I2 is fed througha yarn guide I3 and at the 'beginning of the winding operation the yarnguide I3 is so placed that the yarn is led across the mouth of the chuckIl prior to the insertion of the quill It therein. Thus, when the quillis inserted the yarn. lies in the chuck behind the quill as shownparticularly in Figure 3 and is held until the time the winding isstarted by rotation of the chuck I I. The yarn guide I3 travels back andforth in small steps as the quill is wound and is at the same time fedconstantly to the right as seen in Figures 1, 2 and 3 so that theresulting winding is of an ovate spheroidal form.

This progressive motion is transmitted to the yarn guide by means of thechain I4 which is fastened to the yarn guide support I5. likewisefastened to the yarn guide support I5`is a cam member t6 whichcooperates with and controls the motion of a pivot arm I'I, this armvbeing pivoted on a rod I8 on which is also pivotally mounted an arm 2l!which latter arm is spring pressed in a counterclockwise direction byany suitable meanssuch as for instance a coil spring lll which may becoiledr about the rod I8 as shown in Figure l. Thus, the arm 20 bearsagainst a screw ZI mounted in an extension 22 of the arm I'I, andthereby causes the bent over lug I9 of the arinil' to bear against thecam I6. As will be clear from the drawing, adjustment ofl the screw 2|determines the normal position of the varm I.'I and determines theextent of the cam surfacewhich-shallbe utilized.

, At its far end the arm 20 has formed thereon a U-shaped member 23 thetwo armsof which aredri-lled as indicated at 24 to. provide mountingsfor ashaft 25 which is rotatable therein. Mountedv at one end of theshaft 25 is a bracket .member 25V (see Figures 6` through 8), carryinga' pin 2T and having a set screw 28 whereby its rotational position onthe shaft may be adjusted. On the other end of the shaft there is fixedan arm which is provided at its far end with a ball bearing 3l in whichthere is mounted a the shaft 32 in the bearing 3|. Between the arms ofthe U-shaped members 23 a coil spring 35 surrounds the shaft 25 one endof the coil bearing against the pin 21 and the other end against theunder surface of the base of the U-shaped member 23.

As is apparent from the foregoing description the spring constantlyurges the knife 34 in the direction of the quill I0 and when the arms l1and 20 are rotated in a clockwise direction by the cam I6 the rotaryknife 34 is pressed into a groove 36 in the heel of the quill Il). thequill rotates the knife is driven with it, the pressure between the twobeing determined by the adjustment of the bracket 26 on the shaft 25 andthe yarn is severed when the quill in its rotation causes the yarn topass under the knife 34. Due to the knife form it will be clear thatthere is a very reduced tendency toward dulling of the blade since alarge area of the knife is utilized and different portions presented tothe yarn to be cut and that, furthermore, the knife f has a true cuttingmovement with respect to the yarn and cuts the yarn where it isstretched across the groove 36.

The various stages of the operation are illustrated particularly inFigures 2 through 5. In Figures 2 and 5 the knife is shown in theposition which it occupieswhen the cam I6 has progressed to a pointwhere the bent over lug I 9 rides on the highest portion of its surfaceand this time the knife is in contact with the quill and the cuttingoperation is about`to be performed. In Figures 3 and 4 the cam is shownafter it has passed beyond the range of the bent Thus, as L end bearingagainst said pin and the other against the base of said U-shapedtermination, an arm xedly mounted on said shaft and a knife rotatablymounted on the other end of said arm whereby said rotary knife ispressed against the quill by the rotation of said shaft under urge ofsaid spring.

3. In a device for severing the starting yarn during winding of a quillon an automatic machine, in combination, an arm pivotally mounted `formovement toward and away from the quill,

means for timing the movement of said arm tobracket with respect to saidshaft, spring means lll) over lug I9 and in these figures the parts arev shown in the position which they occupy before and after the cuttingoperation.

While we have described a preferred embodiment of our invention it willbe understood that other forms and devices may be devised. Consequentlywe wish to be limited not by the foregoing description but solely by theappended claims.

What is claimed is:

1. In a device for severing the starting yarn during winding of a quillon an automatic machine, in combination, a rotary knife pivotally andresiliently mounted on one end of a pivotally mounted arm and adapted tocooperate with the quill, means for moving said arm toward and away fromsaid quill, spring means for pressing the knife against the quill duringthe severing operation, and means for adjusting said spring means tothereby adjust the amount of pressure with which the said rotary knifebears against rthe quill.

' a bracket adjustably fixed to said shaft at one end thereof, a pinextending from said bracket,

la spring encompassing said shaft and having one tending to rotate saidshaft, and an arm mounted on said shaft, said arm carrying a rotatablymounted knife, the said adjustment of said bracket serving to adjust thespring pressure with which said knife is pressed against the quill.

4. In a device for severing the starting yarn during the winding of aquill on an automatic machine, in combination, an arm pivotally mountedfor movement toward and away from the quill, means for timing themovement of said arm toward and away from said quill, a rotary knifepivotally mounted on the end of said arm, and means urging said rotaryknife in a direction to make Contact with the quill when said arm is atone extreme of its movement.

5. In a device for severing the starting yarn during the winding of aquill on an automatic machine, in combination, an arm pivotally mountedfor movement toward and away from the quill, means for timing themovement of said arm toward and away from said quill, a rotary knifepivotally mounted on the end of said arm, spring means urging saidrotary knife in a direction to make contact with the quill when said armis at one extreme of its movement, and means for adjusting the saidspring means to vary the pressure exerted by said rotary knife on saidquill when said arm is in yarn-severing position.

6. In a device for severing the starting yarn during winding of thequill on an automatic winding machine, in combination, a rotary knife,means mounting said knife for movement toward and away from the quill,cam means for timing the movement of said mounting means, and springmeans interposed between said rotary knife and said mounting means forconstantly urging said rotary knife in the direction of said quill tothereby vary the pressure exerted upon the quill and the yarn to besevered when said mounting means is in its most forward position withrespect to said quill.

ALBERT A. HASLER.. JACOB PFISTER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,328,196 Rail Jan. 13, 19202,351,472 Beckman 1 June 13, 1944 FOREIGN PATENTS Number Country Date543,373 Great Britain Feb. 23, 1942

